Firefox hangs after resume from hibernation

The problem is basically exactly like described here, only the solution presented there does not actually work for me:

What happens is that every time I hibernate my laptop (with Windows 7 Pro, 64bit), when I resume from hibernation, FF is completely unresponsive (hangs) for minutes. Easily around 5 minutes. Eventually a dialog box pops up with the following:

"A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete."

And the two buttons are: "stop script" or "continue". After I click "stop script" the unresponsiveness finally goes away, and FF starts working normally again.

I think possibly even clicking "continue" also makes it go back to normal, but I'm not sure anymore since I have recently just switched to sleep mode out of frustration in order to not deal with it anymore, and I don't remember exactly if I get the same result from clicking either option.

This is extremely frustrating.

Someone else reported an extremely similar symptom here: It might even be the exact same symptom. Maybe that person simply never waited long enough for the dialog box to appear, but otherwise the unusability symptoms are the same.

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